A Linux networking guide to CIDR notation and configuration
One of the key concepts in network routing that any Linux professional should be familiar with is network notation. CIDR stands for Classless-Inter Domain Routing; it defines a notation methodology for network addressing that is used to specify the network portion of an IP address.
NetworkManager on Linux: #1 — Getting Started
Most current Linux distributions use NetworkManager for creating and managing network connections. Learn what NetworkManager is and how to use it to view network connections and devices for Linux hosts.
An introduction to Linux network routing
Every computer attached to a network requires some type of routing instructions for network TCP/IP packets when they leave the local host. This is usually very straightforward because most network environments are very simple and there are only two options for departing packets.
But that’s not always the case. Learn how to create a router with your Linux computer.
Introduction to the Domain Name System (DNS)
Learn how the global DNS system makes it possible for us to assign memorable names to the worldwide network of machines we connect to every day.
Is Linux Really Secure?
On March 29 of 2024, a security vulnerability was reported against the XZ library as CVE-2024-3094. This vulnerability creates what is known as a backdoor — a known and easy means for CR4CK3R$ to access infected systems and use them for malicious purposes. Considering this, is Linux really more secure than Windows? Is it secure at all?
An introduction to the Linux boot and startup processes with GPT and GRUB2
Ever wondered what it takes to get your system ready to run applications? Here’s what is going on under the hood.
Using rsync for Backup
There are many options for performing backups. Most Linux distributions are provided with one or more open source programs especially designed to perform backups. There are many commercial options available as well. But none of those directly met my needs so I decided to use basic Linux tools to do the job.
Using tar and ssh for backups
Couples complement each other and each member of the couple contributes unique and irreplaceable parts to the whole. But some couples are very odd. Such is the case with this couple of commands – the tar and ssh commands.
How to upgrade your system BIOS/UEFI using FreeDOS
Upgrading your BIOS or EUFI can seem tricky for free open source software users, but it doesn’t have to be.
Linux monitoring tools to keep your hardware cool
Thermal stress can damage your computers. Learn how to monitor the internal temperatures of your computers tohelp you keep your hardware cool.
An introduction to the GNU Core Utilities
Most everything a Linux sysadmin needs to do can be found in the GNU coreutils or util-linux.
How a Display Manager and a Window Manager Light Up Your Screen
The display manager (dm) and the window manager (wm) always work closely together to make your GUI experience smooth and seamless before you even get to your desktop.
A Linux user’s guide to Logical Volume Management
Managing disk space has always been a significant task for sysadmins. Running out of disk space used to be the start of a long and complex series of tasks to increase the space available to a disk partition. Logical Volume Management makes these tasks easy and even unnecessary.
Retro-Fun with CRT
Discover what using old CRT systems was like for us old-timers or relive the days when you used one. The Cool Retro Term (crt) terminal emulator is for us. It’s useful and fun at the same time.
How to generate webpages using CGI scripts
The Common Gateway Interface provides an easy way to build dynamic websites using any language of your choice.
Using sudo to delegate permissions in Linux (Updated)
Learn how to assign authority for managing network functions or specific services to trusted users while protecting the security of the root password.